Are u talking about FIFA World Cup 2022 being aired thru Sports18 channel which is available on Tata Play mobile app? Well there is no such issue of taking away exclusivity or anything, Tata Play has agreement with various broadcasters to provide live stream of their channels on Tata Play Mobile App hence if a broadcaster holds digital rights too for an event then same can be seen of these channels on both DTH and OTT platforms of Tata Play.
There have been many such events which have previously aired on Sony Sports Channels and were available for subscribers on Tata Play app bcoz Sony had its digital rights. Incase a broadcaster does not have digital rights then Tata Play will have to block access to these channels during the airing of said event.
Viacom18 wants maximum viewers to tune into their channels be it thru Regular Satellite channel available on DTH or Cable TV Platforms, OTT platforms like Tata Play app or thru Jio TV. Remember Tata Play would be paying some fee to all these pay tv broadcasters who channels r being live streamed on the Tata Play though they r not charging any additional amount for the same from Tata Play subscribers.
As a matter of fact Airtel Digital TV subscribers get access to all the Sony Sports Channels on Airtel XStream App where we can watch all the sporting events aired on these channels and there is no need to download Sony Liv App for the same. So ur argument that "No other DTH operator can make agreement with broadcasters/OTT platforms to make their sports content available on operator's OTT App & taking exclusivity off the concerned OTT platform of the broadcaster " does not hold true . Also on linear TV too, Airtel Digital TV and Tata Play both r providing Free of Sports18 SD/HD to its subscribers
Tata Play subscribers may also be getting access to all Viacom18/TV18 channels on Tata Play App as part of Voot Select plan offering if same has been subscribed them through various Binge+ plans which r there to chose from